laravel form hidden field

Laravel is a popular PHP framework that provides developers with many convenient features and tools. One of the very practical functions is the form hidden field, which can help us pass some data that needs to be hidden in the form. In this article, we will explain how to use form hidden fields in Laravel.

1. The role of form hidden fields

When developing web applications, we usually need to collect user data from the front-end form and send it to the back-end. Sometimes, we may need to send some additional data to the backend, such as CSRF tokens, etc. However, this additional data may not need to be visible on the front end.

At this time, the form hidden field comes in handy. Hidden fields allow us to place data in the form but make them invisible to the user. Then, when the form is submitted, these hidden data will be submitted to the backend for processing.

2. Using form hidden fields in Laravel

In Laravel, we can use the {{ csrf_field() }} method to generate a CSRF token hidden field. This method generates a hidden field named _token and populates it with the corresponding CSRF token value. The sample code is as follows:

<form method="post" action="/foo">
    {{ csrf_field() }}
    ...
</form>

When the form is submitted, Laravel will verify whether the submitted CSRF token value is valid to ensure that the application is not subject to CSRF attacks.

In addition, we can also use the {{ method_field('PUT') }} method to generate a hidden field named _method and set the HTTP request method to PUT. The sample code is as follows:

<form method="post" action="/foo">
    {{ method_field('PUT') }}
    ...
</form>

3. Manually create a form hidden field

In some cases, you need to manually create a form hidden field. In Laravel, we can manually create a form hidden field using the following method:

<input type="hidden" name="foo" value="bar">

The above code will generate a hidden field named foo and set its value to bar. We can read the value of this hidden field when the form is submitted and process it on the backend.

4. Summary

Form hidden fields are a very practical function in Laravel. It allows us to pass data in the form that does not need to be displayed on the front end, such as CSRF tokens, etc. In Laravel, we can quickly generate these hidden fields through the {{ csrf_field() }} and {{ method_field('PUT') }} methods. At the same time, in some cases, we can also manually create form hidden fields.

I hope this article can help readers better understand how to use form hidden fields in Laravel.

The above is the detailed content of laravel form hidden field. For more information, please follow other related articles on the PHP Chinese website!